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PHOTOSYNTHESIS: • converts light energy to the chemical energy of food 6CO2 + 6H2O + light energy C6H12O6 + 6O2. Happens in all green parts of plants but leaves = major site ~ about half a million chloroplasts/mm2 of leaf surface. Color of leaf due to green pigment chlorophyll.
Stages of photosynthesis. When chlorophyll a absorbs light energy, an electron gains energy and is 'excited'. The excited electron is transferred to another molecule (called a primary electron acceptor). The chlorophyll molecule is oxidized (loss of electron) and has a positive charge.
7 maj 2017 · PDF | On May 8, 2017, Sunil Pareek and others published Chlorophylls: Chemistry and Biological Functions | Find, read and cite all the research you need on ResearchGate.
Chi a is present in all organisms capable of oxygenic photosynthesis, where it occurs in both reaction centers (RC) and in all light-harvesting complexes (LHC) with the exception of the phycobiliproteins (Table 1; see also Table 2 for functions, occurrence, and spectra of Chlorophylls).
Key Points. Light energy splits water and extracts electrons in photosystem II (PSII); then electrons are moved from PSII to cytochrome b6f to photosystem I (PSI) and reduce in energy. Electrons are re-energized in PSI and those high energy electrons reduce NADP + to NADPH.
Figure 1: Chemical structures of photosynthetic pigments: chlorophyll a and b, β-carotene, and violaxanthin (a xanthophyll pigment). Polar groups circled in blue, nonpolar groups circled in red.
Chloroplasts: The Sites of Photosynthesis in Plants • Leaves are the major locations of photosynthesis • Their green color is from chlorophyll, the green pigment within chloroplasts • Light energy absorbed by chlorophyll drives the synthesis of organic molecules in the chloroplast • CO 2 enters and O 2 exits the leaf through
